Unify comments style

- Change /* comments */ to // comments
- Re-generate auto-generated files
- Remove legacy unused GEMMINC SSE micro-kernels

PiperOrigin-RevId: 271901989
diff --git a/src/xnnpack/pad.h b/src/xnnpack/pad.h
index 3cb8103..d3a12ec 100644
--- a/src/xnnpack/pad.h
+++ b/src/xnnpack/pad.h
@@ -35,5 +35,5 @@
 
 
 #ifdef __cplusplus
-} /* extern "C" */
+}  // extern "C"
 #endif